Hello everybody. I have a question or two, or three about the OEM factory AM antenna's for the 69 model year. Were the AM antenna's the same for A, B, and F models? If so was the tip plain or did they all have a groove middle way around it? Reason I'm asking is because I bought an AM mast for my 69 Impala that I'm going to assume is a correct oval type for at least the 69 Impala but not sure if it is correct only because I have never seen one for comparisons sake. This mast I bought has no groove around the tip. Is there something on antennas here on CRG? I didn't see anything unless I just haven't toughed on it yet. Just being curious. Was there a replacement that just had the plain tip?